*{
  margin: 0px;
  padding: 0px;
  text-decoration: none;
}
header{
  width: 100%;
  background-color: rgb(14, 16, 24);
  text-align: center;
  margin: 0 auto;
  opacity: 0.8;
  box-shadow: 0px 0px 2px;
  position: fixed;
  top: 0px;
  left: 0px;
  z-index: 30;
}
header img{
  width: 130px;
}
nav{
  padding: 5px;
}
nav a{
  font-size: 15px;
  margin-left: 50px;
  color: grey;
  text-decoration: none;
}
a:hover{
  color: white;
}
.content{
  width: 60%;
  text-align: center;
  margin: 90px auto;
  position: relative;
  top: 0px;
  left: 0px;
  z-index: 5;
  font-size: 0px;
}
.content img{
  width: 100%;
  height: 500px;
}
.text{
  width: 100%;
  height: 30px;
  font-size: 15px;
  color: white;
  background-color: rgb(27, 51, 91);
  opacity: 0.8;
  position: absolute;
  line-height: 30px;
  bottom: 47px;
  left: 0px;
  z-index: 10;
}
.dian span{
  display: inline-block;
  width: 3px;
  height: 3px;
  background-color: grey;
  border: 2px solid grey;
  border-radius: 5px;
  margin: 20px;
}
span:hover{
  background-color: transparent;
}
.p{
  width: 60%;
  margin: -80px auto;
  font-size: 15px;
  color: grey;
  padding: 20px 0px;
  text-indent: 30px;
  border-top: 1px solid rgb(215, 215, 215);
  border-bottom: 1px solid rgb(215, 215, 215);
}
.hezuoshang{
  width: 60%;
  margin: 100px  auto;
  text-align: center;
}
.hezuoshang img{
  display: inline-block;
  width: 50px;
}
.lunbo{
  width: 60%;
  margin: 10px auto;
}
.left{
  width: 30%;
  border: 1px solid grey;
  box-shadow: 2px;
  border-radius: 4px;
  position: relative;
  top: 0px;
  left: 0px;
  z-index: 5;
  float: left;
  margin-left: 15px;
  margin-bottom: 15px;
}
.left img{
  width: 100%;
  height: 150px;
  margin: 0px auto;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
}
.text2{
  width: 100%;
  height: 20px;
  color: grey;
  background-color: white;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  text-align: center;
}
.mask{
  width: 100%;
  height: 150px;
  color: white;
  background-color: rgb(20, 24, 38);
  opacity: 0;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  position: absolute;
  top: 0px;
  left: 0px;
  z-index: 10;
  text-align: center;

}
.mask h4{
  margin-top: 40px;
}
.mask h6{
  margin-top: 10px;
}
.left:hover .text2{
  color: black;
}
.left:hover .mask{
  opacity: 0.5;
}
.lunbo::after{
  content: "";
  display: block;
  clear: both;
}
footer{
  width: 100%;
  background-color: rgb(217, 217, 217);
  margin: 0px auto;
}
footer::after{
  content: "";
  display: block;
  clear: both;
}
.fleft{
  width: 49%;
  float: left;
  text-align: right;
  margin-top: 20px;
}
.fleft img{
  width: 10%;
}
.fright{
  width: 49%;
  float: right;
  font-size: 12px;
  color: grey;
  border-left: 1px solid grey;
  padding-left: 10px;
  margin-top: 10px;
}
.fright ul{
  list-style: none;
}
.fright img{
  width: 130px;
}
